get_features.m

function x = get_features(im, config, cos_window)
%GET_FEATURES
%   Extracts dense features from image.

    cell_size=config.features.cell_size;
    nwindow=config.features.window_size;
    nbins=config.features.nbins;
    
    %HOG features, from Piotr's Toolbox
    x = double(fhog(single(im) / 255, cell_size, config.features.hog_orientations));
    x(:,:,end) = [];  %remove all-zeros channel ("truncation feature")

    % pixel intensity histogram, from Piotr's Toolbox
    h1=histcImWin(im,nbins,ones(nwindow,nwindow),'same');        
    h1=h1(cell_size:cell_size:end,cell_size:cell_size:end,:);

    % intensity ajusted hitorgram

    im= 255-calcIIF(im,[cell_size,cell_size],32);
    h2=histcImWin(im,nbins,ones(nwindow,nwindow),'same');
    h2=h2(cell_size:cell_size:end,cell_size:cell_size:end,:);

    x=cat(3,x,h1,h2);
        	
	%process with cosine window if needed
	if ~isempty(cos_window),
		x = bsxfun(@times, x, cos_window);
	end
	
end